The Interline Power Flow Controller (IPFC) is one of the latest generation flexible AC (FACTS) transmission controllers used to control the power flows of multiple transmission lines. This paper presents a mathematical model of IPFC, called power injection model (PIM). This model is incorporated in the NewtonRaphson (NR) power flow algorithm to study the power flow control in the transmission lines in which the IPFC is placed. A program has been written in MATLAB to extend the conventional NR algorithm based on this model. The numerical results are carried out on a standard machine 5 bus system 2.
The most powerful and versatile FACTS devices are the Unified Power Flow Controller (UPFC) and the Interline Power Flow Controller (IPFC). It is found that, in the past, much effort has been made in the UPFC modeling for power flow analysis. However, UPFC aims to compensate for a single transmission line, while the IPFC is designed to compensate and manage the power flow of the multi-line transmission system. The Interline Power Flow Controller (IPFC) is a new member of the FACTS controllers. Like STATCOM, SSSC and UPFC, the IPFC also employs the voltage source converter as a basic building block.